*{
    padding: 0;
    margin: 0;
    list-style: none;
    box-sizing: border-box;
    color: #333;
}
.header{
    width: 100%;
    height: 40px;
    background-color: rgb(252, 193, 193);
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    text-align: center;
    line-height: 40px;
    background-image: linear-gradient(45deg,rgb(241, 163, 163), #f5e6d6);;
}

.container{
    width: 100%;
    padding: 20px;
}
/*包含以下四种的链接*/
a {
    text-decoration: none;
}
/*正常的未被访问过的链接*/
a:link {
    text-decoration: none;
}
/*已经访问过的链接*/
a:visited {
    text-decoration: none;
}
/*鼠标划过(停留)的链接*/
a:hover {
    text-decoration: none;
}
/* 正在点击的链接*/
a:active {
    text-decoration: none;
}
